<!DOCTYPE html><html><head>
  <title>::first-line pseudo-element</title>
  <style type="text/css">p:first-line { background-color : lime }
</style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/">
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content="">
 </head>
 <body>
<p>This very long paragraph should have a
      first line with green background. This very long paragraph should have a first
      line with green background.  This very long paragraph should have a first line
      with green background. This very long paragraph should have a first line with
      green background. This very long paragraph should have a first line with green
      background. This very long paragraph should have a first line with green background.
      This very long paragraph should have a first line with green background.</p>

</body></html>